Abstract
In the present research, different electrical discharge machining (EDM) process parameters are investigated on alloyed tool steel. Several experiments are conducted to investigate the effect of four process parameters, i.e., peak current (Ip), pulse on-time (Ton), polarity, and electrode material, on the machining process. The machining process is evaluated by the material removal rate (MRR), electrode wear ratio (EW%), and surface roughness (SR) as indicators of the process efficiency in terms of quality and cost. Different process parameters were experimentally investigated and statistically analyzed, and the results showed that the graphite electrode with negative polarity leads to the highest MRR, whereas the brass electrode with positive polarity leads to the lowest SR. Using a copper electrode with positive polarity resulted in the lowest EW%, while copper with negative polarity led to an instability in the process.
Published Version
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